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    Preheated not working

    Preheat system not working on Cummins 6BTA. Preheat light comes on with key, but stays on after cranking. Deffinately no preheat working. Have replaced the solenoids and even the heater unit. Any ideas would be appreciated.
    Archie
    4788
    2001

    #2
    You might get more replies by posting in the motoryacht section.
    1999 3788, Cummins 270 "Freedom"
    2013 Boston Whaler 130 SS
    Anacortes, WA
    Isla Verde, PR

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      #3
      Have you checked the fuse in the wiring behind the aftercooler?
      "Impasse". 2001 3988
      Cummins 330's
      Puget Sound

      "You don't want to be the richest guy in the nursing home..."

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        #4
        Agree with BAL734, check the fuse/relays. When you power on, do you hear the relays click? When one of mine quit, I found a loose ground wire. The cummins manual also has a good description for diagnostics.

        Just a bit of info, when mine quit, I spoke with the cummins service tech and he told me to look into the obvious, as he has only replaced one module in the 35 years he serviced these.

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